Method of wheel manufacture for correcting rotational non-uniformity of apneumatic tire and wheel assembly, apparatus for performing such method, and the resulting wheel

Abstract From the Canadian patent

A method and apparatus for forming bolt and centerpilot mounting openings in vehicle wheels particularly, styled-disc vehicle wheels. A preformed rim and disc assembly is engaged and fixtured around the rim bead seat with the inboard disc face resting on a lower die assembly and without plastic deformation to the rim or disc. An upper die assembly having an array of bolt hole punches is moved into piercingand-coining engagement with the disc to form the bolt openings Continued motion of the upper die assembly against the wheel disc pushes the disc and lower die assembly into shearing engagement with a center punch which forms the center-pilot opening. The axes of the bolt openings and/or …